# subagentsessions.com — the Session primitive

> The Session primitive: the real 4-state session lifecycle (idle -> running -> rescheduling/terminated) from session-operations.md, complementing subagentmemories.com's session_attachments (the resource-attachment half of a session).

## API
- GET /api/session-statuses — list all cataloged session lifecycle statuses
- GET /api/changes — newest-first change feed (?cursor=&limit=) for polling agents
- POST /mcp — Streamable-HTTP MCP endpoint (initialize / tools/list / tools/call get_session_statuses); server card at /.well-known/mcp/server-card.json

## Grounding
The lifecycle rows are the doc's real session states (idle -> running -> rescheduling/terminated).
Canonical source: https://platform.claude.com/docs/en/managed-agents/session-operations.md

## Family
This site is one of the Cloudflare Workers in the subagent*.com family. For the
live, machine-readable directory of every sibling domain, Cloudflare zone ID,
and worker binding, fetch:
https://subagentsubdomains.com/api/dns-zones

For a unified catalog of every API route across every primitive in the family:
https://subagentapi.com/api/catalog